Suggested TODO: allow ALTERing of typemods without heap/index rebuild

All,

I just realized that even if you do this:

table foo (id    serial,bar    varchar(200)
)

ALTER TABLE foo ALTER COLUMN bar TYPE VARCHAR(1000)

... it triggers a heap & index rebuild, even though it's completely 
unnecessary.  Is this a special case of VARCHAR, or are there other 
types where we should be allowing typemod changes without rebuilding?

-- 
Josh Berkus
PostgreSQL Experts Inc.
www.pgexperts.com